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The DensElement™ Barrier System with FastFlash

The DensElement™ Barrier System with FastFlash

PROSOCO has teamed up with Georgia‐Pacific Gypsum, one of the leading manufacturers of gypsum sheathing, to bring a time- and money‐saving, revolutionary new product to the construction industry. The DensElement™ Barrier System unites science with technology.

FastFlash is the only GP-approved flashing membrane for the DensElement™ Barrier System. Comprised only with approved components, the system has undergone rigorous performance testing for conformance with the current water-resistive barrier and air barrier requirements of the International Building Code (IBC) and the International Energy Conservation Code (IECC). Those components include DensElement™ Sheathing from Georgia-Pacific Gypsum and R-Guard® FastFlash® Liquid Flashing Membrane.




How it works

DensElement™ Barrier System with AquaKOR™ technology from Georgia-Pacific is a new sheathing barrier system that integrates a water- and air-resistive barrier within the gypsum core. The system is comprised of three GP‐approved system components: DensElement™ Sheathing, PROSOCO R‐Guard® FastFlash® liquid flashing to fill and seal joints, fasteners, and other penetrations, and PROSOCO PorousPrep™ water‐based primer to prime exposed gypsum edges. As a system solution, the DensElement Barrier System eliminates the need to apply other water or air barriers that cover or coat the entire wall.

For more info on the DensElement™ Barrier System with AquaKOR™ visit .


DensElement layers



When finished with PROSOCO R-Guard® products, the DensElement™ Barrier System features a high vapor permeability that helps walls dry out if moisture is introduced, rather than trapping water inside where it can lead to moisture-related failures in walls.


FastFlash on DensElement




Install DensElement™ Sheathing just like standard fiberglass mat gypsum sheathing.

Seal all rough openings, sheathing joints, vertical corners, fasteners, pipe penetrations, and materials transitions with PROSOCO R-Guard® Fast Flash® liquid flashing.

Installation Guidelines

Download Installation Guide (PDF) 



System Overview Flyer     Time and Labor Savings Flyer    Installation Guidelines  Limited Warranty Details














Submittal Sheet   CSI 3 Part SpecificationRequest A Substitution KitProduct Substitution Request Form

















The premium nature of the DensElement™ Barrier System merits a premium warranty. In addition to our typical 5-year manufacturer's defect limited warranty for the DensElement™ Sheathing and our typical 12-month limited warranty against delamination or deterioration of the DensElement™ Sheathing from exposure to normal weather, Georgia Pacific and PROSOCO have added a 12-month limited warranty for performance of the DensElement™ Barrier System as a water-resistive and air barrier (WRB-AB) to assure that a properly installed system performs exactly the way you expect it to. See our limited warranty for complete details.

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Field Support

PROSOCO's nationwide network of field and technical reps from coast to coast are at the ready to guide you through your DensElement projects. When issues crop up on the job site, that’s when other manufacturers tend to make themselves scarce. That’s where PROSOCO is different. That’s where we specialize.

GP DensElement Technical Hotline 800-225-6119

PROSOCO DensElement Technical Hotline 800-358-7809

For general questions and requests, visit here